Question: which set of numbers with the highest upper limit?
Paraphrase: Name the set of numbers that has the highest upper limit?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q3054943 . ?ent wdt:P5448 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: singleton of 0, set of non-positive integers, set of negative integers